US20110119454A1 - Display system for simultaneous displaying of windows generated by multiple window systems belonging to the same computer platform - Google Patents

Display system for simultaneous displaying of windows generated by multiple window systems belonging to the same computer platform Download PDF

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Publication number
US20110119454A1
US20110119454A1 US12/620,319 US62031909A US2011119454A1 US 20110119454 A1 US20110119454 A1 US 20110119454A1 US 62031909 A US62031909 A US 62031909A US 2011119454 A1 US2011119454 A1 US 2011119454A1
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Prior art keywords
computer device
window
data
memory
display
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Abandoned
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US12/620,319
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English (en)
Inventor
Hsiang-Tsung Kung
Teng-Chang Chang
Shao-Hsuan KAO
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Institute for Information Industry
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Institute for Information Industry
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Priority to US12/620,319 priority Critical patent/US20110119454A1/en
Assigned to INSTITUTE FOR INFORMATION INDUSTRY reassignment INSTITUTE FOR INFORMATION INDUSTRY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHANG, TENG-CHANG, KAO, SHAO-HSUAN, KUNG, HSIANG-TSUNG
Priority to TW098141852A priority patent/TWI425415B/zh
Priority to JP2009284262A priority patent/JP5268157B2/ja
Priority to CN2009102505353A priority patent/CN102063242A/zh
Priority to GB1001551.9A priority patent/GB2475358B/en
Priority to DE102010002288A priority patent/DE102010002288A1/de
Publication of US20110119454A1 publication Critical patent/US20110119454A1/en
Abandoned legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/44—Arrangements for executing specific programs
    • G06F9/451—Execution arrangements for user interfaces
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/14—Display of multiple viewports
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/12—Overlay of images, i.e. displayed pixel being the result of switching between the corresponding input pixels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/12—Frame memory handling
    • G09G2360/125—Frame memory handling using unified memory architecture [UMA]

Definitions

  • the disclosure relates generally to display systems and display methods thereof, for simultaneous displaying of windows generated by multiple window systems of a plurality of computer devices belonging to the same desktop or laptop platform on the display device of one of these computer devices.
  • window data from multiple computer devices may be displayed on a display device of a single computer device.
  • VNC Virtual Network Computing
  • windows generated by multiple networked computer devices can be displayed on a display device of one of these devices.
  • the VNC requires the use of a predefined network protocol between the computer devices and a network connecting these devices.
  • such a platform consisting of both x86- and ARM-based computer devices can generally use the ARM CPU to reduce power consumption, while still being able to run x86 applications by using the x86 CPU.
  • these computer devices each have their own window systems.
  • Prior to this invention there were no display systems capable of simultaneous displaying windows generated by a plurality of window systems on the same desktop or laptop platform.
  • An embodiment of a display system for simultaneous displaying of windows generated by multiple window systems comprises a master computer device with a display device, at least one slave computer device, a shared memory, an input means and an output means, as described herein.
  • Each of the master computer device and the at least one slave computer device has a corresponding window system.
  • the shared memory is coupled to the master computer device and the at least one slave computer device.
  • the input means receives multiple windows simultaneously generated by the window systems of the master computer device and the at least one slave computer device.
  • the output means displays the multiple windows on the display device of the master computer device, wherein the master computer device and the at least one slave computer device simultaneously read and write window data stored in the shared memory.
  • a display method for simultaneous displaying of windows generated by the window system of a master computer device and that of at least one slave computer device in a display device of the master computer device is provided, wherein the display system includes the master computer device with a display device, the at least one slave computer device and a shared memory accessible by the master computer device and the at least one slave computer device.
  • the method comprises: storing window data of the at least one slave computer device to the shared memory; obtaining the window data of the slave computer device from the shared memory by the master computer device; and merging all of the obtained window data to generate a composite window data, wherein the composite window data is displayed on the display device by the master computer device.
  • a display method for simultaneous displaying of windows in a display system comprising a master computer device with a display device and a corresponding window system, at least one slave computer device with a corresponding window system and a shared memory.
  • the method comprises the following steps. First, an activation signal for activating an application of the at least one slave computer device is received by the master computer device. Thereafter, the application is performed on the at least one slave computer device to create window data of the application, wherein the window data of the application is written to the shared memory by the window system of the at least one slave computer device.
  • the window data of the application is obtained by the master computer device from the shared memory, a composition for a current window data and the obtained window data is performed by the master computer device to generate a composite window data which is then displayed on the display device by the window system of the master computer device.
  • Display methods and systems may take the form of a program code embodied in a tangible media.
  • the program code When the program code is loaded into and executed by a machine, the machine becomes an apparatus for practicing the disclosed method.
  • FIG. 1 is a schematic diagram illustrating an embodiment of a display system of the invention
  • FIG. 2 illustrates an embodiment of a shared-memory of the invention
  • FIGS. 3A and 3B illustrate embodiments of look-up tables used by the window location system of the invention
  • FIG. 4 illustrates an embodiment of a user interface of the invention
  • FIG. 5 is a flowchart of an embodiment of a display method for activating an application running on the at least one slave computer device from the master computer device of the invention
  • FIG. 6 is a flowchart of another embodiment of a display method for displaying multiple windows simultaneously generated by the master computer device and the at least one slave computer device in a display device of a display system of the invention
  • FIG. 7 is a flowchart illustrating an embodiment of a method for accessing the shared memory for the master computer device of the invention.
  • FIG. 8 is a schematic diagram illustrating an embodiment of a window composition operation of the invention.
  • FIG. 1 is a schematic diagram illustrating an embodiment of a display system 100 of the invention.
  • the display system 100 at least comprises two or more computer devices 110 and 120 , a shard memory 130 , a display device 140 , a switching unit 150 , an input means 160 and an output means 170 .
  • Each computer device may further comprise a processing unit for controlling and computing operation of the computer device, a window system used in the computer device and an operating system (OS) running the window system.
  • OS operating system
  • the window system may further comprise a window manager for handling the display of the window data. For example, as shown in FIG.
  • the computer device 110 may comprise a processing unit 112 for controlling and computing operation of the computer device 110 , a window system 114 used in the computer device 110 and an operating system 116 running the window system 114 .
  • the computer device 120 may comprise a processing unit 122 , a window system 124 used in the computer device 120 and an operating system 126 running the window system 124 .
  • the computer devices 110 and 120 may have processing units with the same processing unit type and window system running on the same OS, such as the x86 series CPU (central controlling unit) processing unit type and the MicrosoftTM Windows-based window operating system.
  • the display system 100 may comprise a plurality of heterogeneous computer devices on the same platform.
  • the computer devices 110 and 120 may have processing units with different processing unit types and/or different window systems running on different OSes.
  • the processing unit type of the computer device 110 may be the x86 series CPU and the processing unit type of the computer device 120 may be an ARM processor.
  • the type of the window system 114 of the computer device 110 may be a MicrosoftTM Window-based window system while the type of the window system 124 of the computer device 120 may be a Linux-based window system.
  • the shared memory 130 is coupled to and accessible by the computer devices 110 and 120 .
  • the computer devices 110 and 120 may connect to the shared-memory 130 through a connection interface.
  • the connection interface may be, for example, any kind of bus device such as a PCI-E bus device.
  • the computer device which controls the display of the display device 140 e.g., an LCD display
  • the at least one other computer device is referred to as the slave computer device.
  • the computer device 110 directly controls the display of the display device 140
  • the computer device 110 is referred to as the master computer device while the computer device 120 is referred to as the at least one slave computer device hereinafter.
  • the computer device 120 may directly control the display of the display device 140 and thus it is referred to as the master computer device while the computer device 110 is referred to as the at least one slave computer device in another embodiment.
  • the at least one slave computer device 120 may write window data to the shared-memory 130 and the master computer device 110 may read the window data from the shared-memory 130 simultaneously.
  • the switching unit 150 is connected between the computer devices 110 and 120 and the display device 140 to selectively display the screen of the computer device 110 or the computer device 120 on the display device 140 according to a master selection for selecting which computer device to be the master computer device. For example, the screen of the computer device 110 will be displayed on the display device 140 if a mater selection indicating that the computer device 110 is set to be the master computer device is received by the switching unit 150 .
  • the input means 160 is coupled to the master computer device 110 and the at least one slave computer device 120 to receive multiple windows simultaneously generated by the window systems of the master computer device 110 and the at least one slave computer device 120 .
  • the output means 170 is used for generating and displaying the multiple windows on the display device 140 .
  • the inputs means 160 and the output means 170 may be implemented by hardware, software or a combination thereof and are well known in the art, thus detailed description is omitted here.
  • the shared memory 130 may be divided into memory modules with the same or different memory sizes.
  • the shared memory 130 may further comprise a number of memory modules, each of which with a corresponding memory controller.
  • Each memory module may be independently accessed by its own memory controller so that the shared memory may support simultaneous reading and writing of data in the memory modules via multiple memory controllers.
  • the shared memory 130 may be any type of accessible memory structure.
  • the shared memory may be a set of linked memory modules together with a management system for identifying the next memory module to write or read.
  • the shared memory 130 may be a ring buffer memory with a management system for processing linked data files to identify a next memory module to write, but it is not limited thereto.
  • the size of each memory module may be determined based on a maximum window size used in the window systems 114 and 124 .
  • the maximum window size used in the window systems 114 and 124 is a resolution of 1024*768 with 32 bit color depth
  • each window data of each of the window systems can be written into or read from just one of the memory modules.
  • FIG. 2 illustrates an embodiment of a shared-memory 200 of the invention.
  • the shared-memory 200 is divided into several memory modules with the same size. Three of these memory modules contain window data for the three windows A, B and C shown on a desktop 210 of the master computer device 110 , one module for each window.
  • the desktop 210 represents a desktop screen of the master computer device 110 , which is produced by the window system 124 of the computer device 120 .
  • the maximum window size among the three windows A, B and C on the desktop 210 is that of a window with a resolution of 1024 ⁇ 768 with 32-bit color depth
  • the size of each memory module is defined as 3M bytes.
  • window data of the windows A, B, C may be written into memory modules 201 , 203 and 205 , respectively, although the size of the window data of the windows B and C are less than the size of the memory module.
  • the at least one slave computer device 120 may generate the window data of each window on the desktop 210 and write them into the shared memory 130 .
  • the master computer device 110 may read the window data of the windows from the shared memory 130 .
  • the shared memory 130 may further be associated with a window location system 180 which maps a given window to one of the memory modules containing window data of the given window.
  • the window location system 180 is capable of providing access control for the shared memory 130 .
  • the window location system 180 may comprise a cache memory capable of reading/writing by multiple computer devices (e.g., the master and slave computer devices) and.
  • the window location system 180 may further have, for example, a look-up table with a recorded status of each module, e.g., whether a memory module is available or not, its corresponding memory address and information on content stored in the memory module.
  • the look-up table may be stored in the cache memory such that the window location system 180 may, therefore, utilize the look-up table to obtain a memory address of a given window to map the given window to one of the memory modules containing window data of the given window when data is to be read from or written into the shared memory 130 .
  • FIG. 3A illustrates an embodiment of a look-up table 300 used by the window location system 180 of the invention. Because the module size of the shared-memory 130 may be determined in advance, the memory address of each module may also be known and calculated. Therefore, the look-up table 300 may be used to record a mapping relationship between each window and its corresponding location (i.e., the memory address) in the shared-memory. As shown in FIG. 3A , the look-up table 300 has recorded several items and each item at least comprises a “Module no.” field, a “Memory address” field, an “available” field and a “Window no.” field.
  • the “Module no.” field represents the number of the module
  • the “Memory address” field represents the memory address in the shared memory 130 for the module
  • the “available” field is an available flag indicating whether the module is available or being used in which “Yes” represents that the module is available and can be used to store data while “No” represents that the module is being used and can not be used to store data.
  • the “Window no.” field represents the content of the window data stored therein. For example, referring to the first item of FIG. 3A , it represents that window A of the system 1 is recorded in memory module 1 at memory address 0x0100.
  • the window location system 180 may find an available module having an available flag set to “Yes” in the table 300 and update content of the located memory module in the table 300 . Thereafter, the window data of the newly generated window may be stored into the located memory module.
  • the window data of the newly generated window may be stored into the located memory module.
  • three windows A, B and C created by the master or slave computer device are currently recorded in the table 300 in which window data of windows A, B and C have been stored in modules 1 , 2 and 4 , respectively.
  • an available module in the shared memory 130 may be located by the window location system 180 for storing the window data of window D therein. As shown in FIG.
  • module 3 is represented as being an available module, as such, the window data of the window D will be stored in the module 3 and the available flag will be modified to “No” as shown in FIG. 3B . Therefore, the at least one slave computer device 120 may then write updated window data of window D into the module 3 and the master computer device 110 may read the window data therefrom to obtain the latest window data of window D.
  • the display system 100 of the invention may further provide a user interface for activating specific applications on both the master and slave computer devices.
  • FIG. 4 which illustrates an embodiment of a user interface of the invention which is a desktop 400 with some clickable links (e.g., icons, buttons) and windows.
  • the desktop 400 represents the desktop of a master computer device 100 and the desktop 400 includes two simultaneously displayed windows 410 and 420 and icons 430 - 470 .
  • icons 430 - 450 are predefined as icons which perform specific applications running on the master computer device 110 while icons 460 - 470 are predefined as icons which activate specific applications running on the at least one slave computer device 120 .
  • an activation signal for activating an application on the at least one slave computer device 120 will be generated by the master computer device 110 .
  • the activation signal will be sent to the at least one slave computer device 120 via the connection interface.
  • the at least one slave computer device 120 will activate the application and create a window corresponding thereto.
  • the at least one slave computer device 120 will put the resulting window data into the shared-memory 130 where the master computer device 110 can read the window data.
  • the window system 114 of the master computer device 110 may compose the window on the desktop.
  • FIG. 5 is a flowchart of an embodiment of a display method for activating an application running on the at least one slave computer device by the master computer device of the invention.
  • Each of the master and slave computer devices comprises a corresponding window system.
  • the master and slave computer devices are computer devices with homogeneous or heterogeneous architectures belonging to the same desktop or laptop platform.
  • a user may press a button 470 on the desktop 400 of the computer device 110 shown in FIG. 4 to activate an application of the at least one slave computer device 120 such that an activation signal will be generated.
  • the mater computer device 110 upon receiving the activation signal will activate an application of the at least one slave computer device 120 (i.e., the second computer device) (step S 510 ).
  • the master computer device 100 may then pass the activation signal to the at least one slave computer device via the connection interface.
  • the window system 124 of the at least one slave computer device 120 performs the application corresponding to the activation signal to create window data of the application and writes the window data of the application to the shared memory 130 (step S 520 ).
  • the window system 114 of the master computer device 110 obtains the window data of the application from the shared memory 130 , performs a composition for a current window data and the obtained window data to generate a composite window data and displays the composite window data on the display device 140 (step S 530 ).
  • FIG. 6 is a flowchart of another embodiment of a display method for displaying multiple windows simultaneously generated by the master computer device and the at least one slave computer device in a display device of a display system (e.g., the display system 100 shown in FIG. 1 ) of the invention.
  • the at least one slave computer device 120 stores window data of all of the windows running on the at least one slave computer device 120 to the shared memory 130 .
  • the master computer device 110 obtains the window data of the at least one slave computer device 120 from the shared memory 130 .
  • the master computer device 110 may utilize the windows location system and look-up table of the invention to obtain the window data of the at least one slave computer device 120 from the shared memory 130 .
  • step S 630 the window system 114 of the master computer device 110 composes all of the obtained window data to generate a composite window data and then displays the composite window data on the desktop of the display device 140 .
  • the window system 114 of the master computer device 110 composes all of the obtained window data to generate a composite window data and then displays the composite window data on the desktop of the display device 140 .
  • FIG. 8 please refer to FIG. 8 .
  • FIG. 8 is a schematic diagram illustrating an embodiment of a window composition operation of the invention.
  • Window C and Window D are presented on a desktop 810 of the master computer device 110 and Window A and Window B are presented on a desktop 820 of the slave computer device 120 in which Window A is displayed under Window B.
  • the window system 124 of the slave computer device 120 may maintain positions and z-indexes of windows currently activated in the slave computer device 120 in which the z-indexes represent a layer relationship between the activated windows, e.g., whether one window is displayed under or above another.
  • the window system 124 of the slave computer device 120 may also write indexing information regarding the positions and z-indexes of windows to the shared memory.
  • the window system 114 of the master computer device 110 will maintain the positions and layer relationship for the obtained window data. That is, Window A is still displayed under Window B, using the indexing information.
  • the window system 114 of the master computer device 110 will rearrange the obtained window data and its own window data for Window C and Window D to generate a composite window data on the desktop 810 of the master computer device 110 (as shown in the right side of FIG. 8 ).
  • the desktop of the display device 140 will display not only the window data of the windows currently running on the master computer device 110 but also window data created by all of the activated applications running on the at least one slave computer device 120 .
  • the shared memory 130 may be simultaneously accessed by both the master computer device 110 and the at least one slave computer device 120 , it is possible that a memory module being written by the at least one slave computer device 120 will be read by the master computer device 110 at the same time and as a result the read window data of the memory module may be incorrect.
  • a synchronization method for accessing the shared memory is further provided.
  • FIG. 7 is a flowchart illustrating an embodiment of a method for accessing the shared memory for the master computer device of the invention.
  • the master computer device 110 reads the data from the shared memory 130 and utilizes the window location system 180 to find windows in the shared memory 130 in step S 720 .
  • step S 730 it is determined whether the module to be read is being written. If so, in step S 740 , reading of data of the window in the module to be read is skipped and the module of next window which has not been read is read and then step S 730 is again performed. If it is determined that the module to be read is not being written (No in step S 730 ), in step S 750 , the data of the window in the module is read.
  • step S 760 It is then determined, in step S 760 , whether all of the windows have been read. If not, then it means that some memory modules have been previously skipped and need to be re-checked. Thus, the steps return to steps S 730 -S 740 to check whether the module of the skipped window is available. If the module of the skipped window is available, step S 750 is further performed to read the data of the window in the module.
  • step S 770 the window system 114 of the master computer device 110 composes all of the obtained window data to generate a composite window data and then displays the composite window data on the desktop of the display device 140 to end the process.
  • the master computer device 110 waits until the writing procedure is completed. Therefore, the maximum waiting time to wait for writing data into the shared-memory 130 is no greater than the time to write a full screen window into the shared-memory 130 . Therefore, the shared memory 130 may support simultaneous reading and writing of window data of multiple windows without write/write or read/write conflicts, while incurring a delay before a read or write operation no greater than the maximum time required to write or read the data of a window, respectively.
  • slave computer device 120 only one slave computer device (i.e. the computer device 120 ) is included in the display system 100 in the above embodiments, but the invention is not limited thereto.
  • more than one slave system can be included in the display system 100 and connected to the shared memory 130 such that the slave systems may write their own window data to the shared memory 130 and the master computer device 110 may apply the aforementioned display method to display multiple windows simultaneously generated by the master computer device 110 and all other slave computer devices in the display device 140 of the display system 100 .
  • multiple windows simultaneously generated by multiple computer devices on the same platform can be quickly displayed in a single display device of the display system without utilizing additional hardware resources such as CPU resources, thus providing efficient and immediate window displaying whenever a window is updated or created.
  • users can operate or select applications and/or windows between different computer devices in a single displayed desktop of a single system without being effected from using different operating systems.
  • Systems and display methods thereof, or certain aspects or portions thereof, may take the form of a program code (i.e., executable instructions) embodied in tangible media, such as floppy diskettes, CD-ROMS, hard drives, or any other machine-readable storage medium, wherein, when the program code is loaded into and executed by a machine, such as a computer, the machine thereby becomes an apparatus for practicing the methods.
  • the methods may also be embodied in the form of a program code transmitted over some transmission medium, such as electrical wiring or cabling, through fiber optics, or via any other form of transmission, wherein, when the program code is received and loaded into and executed by a machine, such as a computer, the machine becomes an apparatus for practicing the disclosed methods.
  • the program code When implemented on a general-purpose processor, the program code combines with the processor to provide a unique apparatus that operates analogously to application specific logic circuits.

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US12/620,319 2009-11-17 2009-11-17 Display system for simultaneous displaying of windows generated by multiple window systems belonging to the same computer platform Abandoned US20110119454A1 (en)

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Application Number Priority Date Filing Date Title
US12/620,319 US20110119454A1 (en) 2009-11-17 2009-11-17 Display system for simultaneous displaying of windows generated by multiple window systems belonging to the same computer platform
TW098141852A TWI425415B (zh) 2009-11-17 2009-12-08 顯示系統及其顯示方法
JP2009284262A JP5268157B2 (ja) 2009-11-17 2009-12-15 表示システム及び表示方法
CN2009102505353A CN102063242A (zh) 2009-11-17 2009-12-15 显示系统及显示方法
GB1001551.9A GB2475358B (en) 2009-11-17 2010-01-29 Display system for simultaneous displaying of windows generated by multiple window systems belonging to the same computer platform
DE102010002288A DE102010002288A1 (de) 2009-11-17 2010-02-24 Displaysystem zum gleichzeitigen Darstellen von Fenstern, die durch mehrere Fenstersysteme erzeugt werden, die der gleichen Computerplattform zugeordnet sind

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US12/620,319 US20110119454A1 (en) 2009-11-17 2009-11-17 Display system for simultaneous displaying of windows generated by multiple window systems belonging to the same computer platform

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